Interrupted thread mount primarily for attaching a noise suppressor or other auxiliary device to a firearm

ABSTRACT

An apparatus and method for easily, quickly and reliably attaching a noise suppressor or other auxiliary device to the muzzle end of a firearm barrel and for easily, quickly and reliably removing the noise suppressor or other auxiliary device there from through the novel ideal of providing two or more non equal relieved areas of thread. My invention also provides an internal o-ring to provide friction between the muzzle adaptor and the thread mount of a noise suppressor or other auxiliary device.

BACKGROUND OF THE INVENTION

1. Field of Invention

This invention generally relates to firearms, specifically to systems for attaching a noise suppressor or other device to the threaded muzzle of a firearm barrel using a thread mount and O-ring.

2. Prior Art

Previous systems exist for attaching noise suppressors to a firearm, and specifically for removing or attaching a noise suppressor to a interrupted threaded muzzle of a firearm. Hiram Maxim first used interrupted threads but his design split the thread interruption in half and provided no o-ring for which to further secure the auxiliary device to a firearm. Evenly reliving the threaded area of both the male and female threads creates a variable in the orientation of the noise suppressor or auxiliary device in its relationship to the muzzle. There is a need for a quick, secure attachment system for mounting noise suppressors to a firearm particularly a threaded muzzle which will withstand the vibrations incidental to firing an automatic pistol or other small arm, provide for an opportunity to quickly remove a noise suppressor from the host firearm.

OBJECTS AND ADVANTAGES

Accordingly several objects and advantages of the present invention are

-   -   (a) to provide the capability of quickly attaching a thread         mount silencer to a threaded barrel     -   (b) to provide an internal o-ring near the shoulder of the         barrel which will provide friction between the muzzle of a         firearm and thread mount of a noise suppressor or other         auxiliary device     -   (c) to provide two or more relieved surface areas of differing         dimensions on the threads of a barrel, adaptor or thread mount         to facilitate quickly attaching or removing a noise suppressor         or other auxiliary device.

Still further objects and advantages will become apparent from a consideration of the ensuing description and drawings.

SUMMARY

The present invention provides an apparatus and method for easily, quickly and reliably attaching a noise suppressor or other auxiliary device to the muzzle end of a firearm, and for easily and quickly removing such device there from. The present invention also utilizes an o-ring inside of the thread mount of a noise suppressor or auxiliary device to provide friction and withstand the vibrations incidental to the discharge of the host firearm. In a preferred embodiment of the invention, a noise suppressor is equipped with a thread mount such as described above, with o-ring located near the barrel shoulder when fixed on a firearm muzzle.

In general terms, the invention provides external apparatus for attachment to a firearm including a barrel having a longitudinal axis, comprising the combination of: a interrupted thread; and an auxiliary device having a bore for coaxially receiving the fixture with internal interrupted thread, such device including a o-ring, and a mating surface

More specifically, a preferred embodiment according to the invention provides a interrupted thread mount with two non equal relieved areas of thread which is integral to a noise suppressor apparatus for attachment to a firearm including a barrel having a longitudinal axis, comprising the combination of: an barrel adaptor which is adapted to be attached to the muzzle of the barrel coaxially there with and including an interrupted thread with two non equal relieved areas of thread; and a noise suppressor including a interrupted thread mount with two non equal relieved areas of thread on the back section having a bore for coaxially receiving the barrel adaptor, and including an internal o-ring located near the muzzle entrance of noise suppressor back section which will generate friction between the barrel and noise suppressor.

In a preferred embodiment of the method, the external interrupted thread is provided on the barrel by coaxially affixing a barrel adaptor which incorporates external interrupted threads as a locking surface, and a auxiliary device comprising a noise suppressor with an internal o-ring, and interrupted threads located within the rear mount of the noise suppressor.

DRAWINGS

The novel features believed to be characteristic of the invention, together with further advantages thereof, will be better understood from the following description considered in connection with the accompanying drawings in which a preferred embodiment of the present invention is illustrated by way of example. It is to be expressly understood, however, that the drawings are for the purpose of illustration and description only and are not intended as a definition of the limits of the invention.

FIG. 1 shows a side view of the preferred embodiment thread mount insert;

FIG. 2 shows a top view of the female interrupted threads in the thread mount;

FIG. 3 shows an external side view of a bore, proposed adaptor, and the preferred embodiment for the thread insert, and a noise suppressor;

FIG. 4 shows an internal, side view of the preferred embodiment thread mount insert and the location of the o-ring groove, o-ring and interrupted threads;

FIG. 5 shows a side view of a barrel adaptor with male interrupted threads;

FIG. 6 shows a side view of a barrel adaptor featuring the male interrupted thread insert coupled with the female interrupted thread insert located on the thread mount.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Starting with FIG. 1, there is an illustration of an example thread mount showing the external thread 1 used in the preferred embodiment to attach the thread mount 1 to the noise suppressor.

In FIG. 2, there is illustrated a top view of the thread mount showing the location of the reduced thread area 2 as being located on the rear thread mount.

In FIGS. 4-6, there is illustrated in FIG. 4 an internal, side view of the thread mount indicating the location of the o-ring groove 4, o-ring placement 3 and showing the orientation of the reduced thread area 2 in relationship to the o-ring groove 4. FIG. 5 shows a male adaptor 9 with male relieved thread area 6 and a forward area 7 for which to provide tension against o-ring 4 which is threaded onto a firearm barrel and designed to receive the thread insert 10 indicated in FIG. 4. FIG. 6 shows how the thread adaptor in FIG. 5 and the thread mount of FIG. 4 are oriented once the items are coupled together.

FIG. 5-6 show the location of wrench flats 8 which are present on the male adaptor 9.

In a preferred embodiment according to the present invention, the male adaptor 9 is provided with an external mating surface 11 although the annular mating surface 11 may be included as part of the exterior surface of the firearm barrel.

A used herein, the word “forward” or “front” corresponds to the firing direction of the firearm (i.e., to the right as shown in FIGS. 1, 3, 4, 5, and 6); “rear” or “rearward” or “back” corresponds to the direction opposite the firing direction of the firearm (i.e., to the left as shown in FIGS. 1, 3, 4, 5, and 6); “longitudinal” means the direction along or parallel to the longitudinal axis a of the male adaptor 9 or of the noise suppressor body 12; and “transverse” means a direction perpendicular to the longitudinal direction.

The noise suppressor body 12 includes a thread mount insert 13 having a longitudinal bore for coaxially receiving the male adaptor 9. The noise suppressor body 12 further includes a sound suppressing front section fixedly secured to the thread mount insert 13. Noise suppressing sections of firearm noise suppressors are well known in the firearms art.

The back section of the thread mount insert 13 includes an annular flat surface 15 which is perpendicular to the bore 14. The mating surface 11 present on the male adaptor 9 provides a mating surface when the noise suppressor 12 in attached to the male adaptor 9.

An o-ring placement 3 is secured to the thread mount insert by placing it within the o-ring grove 4 located at the front of the thread mount insert 13. The o-ring placement 3 impinges against the male relieved thread area 6 which prevents the noise suppressor 12 from rotating off of the male adaptor 9.

When installing the noise suppressor 12 onto the male adaptor 9, the engagement of the noise suppressor 12 reduced thread area 2 to the male adaptor's relieved thread area 6. The noise suppressor may only be oriented one way due to the variable dimensions present on the reduced thread area 2 and male relieved thread area 6.

To install the noise suppressor 12 onto the male adaptor 9, the noise suppressor 12 is placed rearwardly onto the male adaptor's forward area 7 such that the male adaptor 9 is longitudinally received by the thread insert 13, until the reduced thread areas are lined up in a manner which allows the reduced threads areas 2 and 6 to engage one another. The noise suppressor 12 is slid down the male adaptor 9 until it seats against the mating surface 11, then the noise suppressor is rotated one half turn until the forward tension area 5 and o-ring 3, mating surface 11 and annular flat surface 15 fully engage one another respectively. The noise suppressor 12 is threadedly rotated until the annular flat shoulder 15 seats against the mating surface 11 engaging the forward tension area 5 against the o-ring 3 thus keeping the noise suppressor 12 secure from unthreading.

Upon such installation, the noise suppressor is fixedly secured to the male adaptor 9 (and hence to the bore 14) both longitudinally and rotationally.

To remove the noise suppressor from the firearm 14, the noise suppressor 12 rotated in the reverse or unthreading direction. The back section may be forwardly longitudinally withdrawn from the male adaptor 9 and the bore 14 when the noise suppressor 12 is moved longitudinally forwardly.

Thus, there has been described a preferred embodiment of an apparatus for easily, quickly and reliably attaching a noise suppressor or other auxiliary device to the muzzle end of a firearm, and for easily and quickly removing the device there from, as well as a method for such attachment. Other embodiments of the present invention, and variations of the embodiment described herein, may be developed without departing from the essential characteristics thereof. Accordingly, the invention should be limited only by the scope of the claims listed below.

CONCLUSION, RAMIFICATION, AND SCOPE

Accordingly the reader will see that, according to the invention, I have provided a system for quickly attaching a noise suppressor to a firearm. I have also afforded any user of my invention the ability to consistently orient the noise suppressor on the host firearms barrel with the two non equal relieved areas of thread. Further is can be seen that the o-ring present as part of the noise suppressor mount reduces the chance of the noise suppressor backing off due to the incidental vibrations resulting from discharging the host firearm.

While my above drawings and description contain many specificities, these should not be construed as limitations on the scope of the invention, but rather as an exemplification of one preferred embodiment thereof. For example the male adaptor 9 described about could easily be incorporated directly onto the barrel of a firearm. The mating surface 11 and associated male relieved thread area 6 can be used with other auxiliary devices meant to be attached to the muzzle of a firearm. The male relieved thread area 6 could incorporate standard threads that lack the novel two non equal relieved areas of thread present on item 6 and 2.

Accordingly, the scope of the invention should be determined not by the embodiments illustrated, but by the appended claims and their legal equivalents.” 

1. An apparatus that attaches to the end of a gun barrel to facilitate coaxially mounted auxiliary accessories, comprising the combination of: a fixture adapted to be attached to the muzzle of the barrel coaxially there and coaxial to said bore and including annular seating surface and annular locking surface, said fixture having a forward area consisting of two non equal relieved areas of thread; and a noise suppressor including a back section having a bore for coaxially receiving said fixture, said back section including a o-ring concentric to the above said bore that engages said forward area consisting of two non equal relieved areas of thread resulting in said noise suppressor rotational restrained, said back section further consisting of two non equal relieved areas of thread.
 2. The apparatus according to claim 1, wherein: said fixture is a thread adaptor.
 3. The apparatus according to claim 1, wherein: said thread adaptor includes an edge about said bore engaging said ridge when said fixture is received by said bore.
 4. The apparatus according to claim 1, wherein: said thread adaptor features two non equal relieved areas of thread on the fore end for threadedly receiving a noise suppressor or other auxiliary device.
 5. The apparatus according to claim 1, wherein: said noise suppressor includes a back section for coaxially receiving said thread adaptor.
 6. The apparatus according to claim 5, wherein: said back section is larger in diameter than said thread adaptor.
 7. Noise suppressor apparatus for attachment to a firearm including a barrel having a longitudinal axis, comprising the combination of: a fixture adapted to be attached to the muzzle of the barrel coaxially there and coaxial to said bore and including annular seating surface and annular locking surface, said fixture having a forward area consisting of two non equal relieved areas of thread; and a noise suppressor including a back section having a bore for coaxially receiving said fixture, said back section including an internal o-ring which engages the threaded area above said fixture and an annular seating surface which interfaces with said annular locking surface.
 8. The apparatus according to claim 7, wherein: said fixture is a noise suppressor with a back section consisting of a thread mount.
 9. The apparatus according to claim 7, wherein; said thread mount has an internal o-ring and two non equal relieved areas of thread.
 10. The apparatus according to claim 7, wherein; said two non equal relieved areas of thread will receive the two non equal relieved areas of thread present on said thread mount in claim
 4. 